论文部分内容阅读
东北大黑鳃金龟幼虫在我省分布厂,为害重。为了将蛴螬为害控制在经济允许水平之下,给大面积防治提供科学依据,于1988年在省植保植检站、鞍山市园艺科学研究所分别进行了蛴螬为害玉米、花生防治指标研究。试验分二步进行,一是室内饲养观察东北大黑鳃金龟幼虫3龄期食量;二是田间接虫测定为害玉米、花生后的产量损失,并制定出防治指标。研究结果证明东北大黑鳃金龟3龄幼虫平均取食玉米胚乳1.74克或花生种子1.58克。当允许损失率5%时,防治指标为:玉米每平方米1.67头,花生每平方米0.63头;当允许损失
Northeast black gill beetle larvae distributed plants in our province, as heavy. In order to control the catfish under the allowable level of economic allowance to provide a scientific basis for large-scale prevention and control, in 1988 in the provincial plant protection and plant protection stations, Anshan Institute of Horticulture, respectively, corn and peanut damage control indicators. The experiment was divided into two steps. The first was the indoor feeding to observe the 3rd instar appetizer of Larix gmelini in Northeast China; the second was the yield loss after maize and peanut were tested in the field and the prevention and control index was established. The results showed that the third instar larvae of the Macrophyllidae in Northeast China fed 1.74 g of corn endosperm or 1.58 g of peanut seeds on average. When the allowable loss rate is 5%, the control indexes are: 1.67 heads per square meter of corn and 0.63 heads per square meter of peanut;